<template>
    <div>
                <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
        <!-- 警告区域 -->
        <el-alert title="注意：只允许第三级分类设置相关参数" type="warning" :closable="false" show-icon></el-alert>
    
        <el-row class="cat">
            <el-col>
                <span>
                    选择商品分类:
                </span>
                <!-- 级联选择框 -->
                <!-- options指定数据源  props指定数据对象 selectedCateKeys数据的双向绑定 -->
                <el-cascader
                    v-model="selectedCateKeys"
                    :options="catelist"
                    :props="cateProps"
                    expand-trigger="hover"
                    clearable
                    @change="handleChanged">
                </el-cascader>
            </el-col>
        </el-row>
        <!-- tab页签区域 -->
        <el-tabs v-model="activeName" @tab-click="handleTabClick">
            <!-- 动态参数面板 -->
            <el-tab-pane label="动态参数" name="many">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
                <el-table :data="manyTabData" border stripe>
                    <!-- 展开行 -->
                    <el-table-column type="expand">
                        <template slot-scope="scope">
                            <!-- 循环渲染tag标签 -->
                            <el-tag closable @close="handleClose(i,scope.row)"  v-for="(item,i) in scope.row.attr_vals" :key="i">
                                {{item}}
                            </el-tag>
                            <!-- 添加新标签 -->
                    <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)"
                        >
                    </el-input>
                    <!-- 添加按钮 -->
                    <el-button v-else class="button-new-tag"
                        size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                        </template>
                    </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type="index"></el-table-column>
                    <!-- 参数名车 -->
                    <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                        <template slot-scope="scope">
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showeditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteDialog(scope.row.attr_id)">删除</el-button>
                        </template>
                    </el-table-column>
                </el-table>
            </el-tab-pane>
            <!-- 静态属性面板 -->
            <el-tab-pane label="静态属性" name="only">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
                <!-- 静态属性表格 -->
                <el-table :data="onlyTabData" border stripe>
                    <!-- 展开 -->
                    <el-table-column type="expand">
                        <template slot-scope="scope">
                            <!-- 循环渲染tag标签 -->
                            <el-tag closable @close="handleClose(i,scope.row)"  v-for="(item,i) in scope.row.attr_vals" :key="i">
                                {{item}}
                            </el-tag>
                            <!-- 添加新标签 -->
                    <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)"
                        >
                    </el-input>
                    <!-- 添加按钮 -->
                    <el-button v-else class="button-new-tag"
                        size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                        </template>
                    </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type="index"></el-table-column>
                    <!-- 属性名车 -->
                    <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                        <template slot-scope="scope">
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showeditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteDialog(scope.row.attr_id)">删除</el-button>
                        </template>
                    </el-table-column>
                </el-table>
            </el-tab-pane>
        </el-tabs>
    </el-card>

    <!-- 添加参数的对话框 -->

    <el-dialog
        :title=" '添加' + titleText"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed"
        >
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
        </el-form>

        <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 修改参数的对话框 -->
    <el-dialog
        :title=" '修改' + titleText"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
        >
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
        </el-form>

        <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
    </el-dialog>

    </div>
</template>

<script>
export default{
    data(){
        return{
            // 商品分类列表
            catelist: [],
            // 级联选择框的配置对象
            cateProps:{
                value: 'cat_id',
                label: 'cat_name',
                children: 'children'
            },
            // 级联选择框双向绑定到的数组
            selectedCateKeys : [],
            //被激活的页签的名称
            activeName: 'many',
            onlyTabData: [],
            manyTabData: [],
            addDialogVisible: false,
            // 添加参数的表单对象
            addForm: {
                attr_name: '',

            },
            // 添加表单的验证规则对象
            addFormRules:{
                attr_name: [
                    {
                        required: true,
                        message: '请输入名称',
                        trigger: 'blur'
                    }
                ]
            },
            //修改参数对话框
            editDialogVisible: false,
            //修改表单的数据对象
            editForm: {
                attr_name:''
            },
            //修改
            editFormRules:{
                attr_name: [ 
                    {
                        required: true,
                        message: '请输入名称',
                        trigger: 'blur'
                    }
                ]
            },
            // //添加标签的本本狂显示
            // inputVisible: false,
            // // 输入框的neirong
            // inputValue: '',

        }
    },

    created(){
        this.getCateList()
    },

    methods:{
        async getCateList(){
           const {data: res} =  await this.$http.get(`categories`);
            if(res.meta.status !== 200){
                return this.$message.error('获取商品列表失败')
            }
            this.catelist = res.data
            // console.log(res.data)
        },
        // 级联选择框的变化触发监听
        handleChanged(){
            this.getParamsData()

        },
        // Tab页签点击事件的处理函数
        handleTabClick(){
            // console.log(this.activeName)
            this.getParamsData()
        },
        async getParamsData(){
            //不是三级分类
            if(this.selectedCateKeys.length !== 3){
                this.selectedCateKeys = []
                this.onlyTabData = [],
                this.manyTabData = []
                return
            }
            //是三级分类
            // console.log(this.selectedCateKeys);
            //根据所选的分类的额id  获取参数
            const {data : res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                params: { sel: this.activeName}
            })
            if(res.meta.status!==200){
                return this.$message.error('获取'+this.titleTextname+'失败')
            }
            
            res.data.forEach(item =>{
                item.attr_vals = item.attr_vals ?
                item.attr_vals.split(' ') : []
                //控制文本框的显示隐藏
                item.inputVisible = false
                //文本框内容默认空
                item.inputValue = ''
            })
            console.log(res.data)

            if(this.activeName === 'many'){
                this.manyTabData = res.data
            }else{
                this.onlyTabData = res.data
            }
        },
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        //添加参数按钮i
        addParams(){
            this.$refs.addFormRef.validate(async valid =>{
                if(!valid) return
                const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,
                {
                    attr_name: this.addForm.attr_name,
                    attr_sel: this.activeName//当前激活的哪个标签页
                })
                if(res.meta.status!==201){
                    return this.$message.error('添加'+this.titleTextname+'失败')
                }
                this.$message.success('添加'+this.titleTextname+'成功')
                this.addDialogVisible = false
                this.getParamsData()
            })
        },
        async showeditDialog(attr_id){
            //查询当前参数的信息
            const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,
            {
                params: { attr_sel:this.activeName }
            })
            if(res.meta.status !== 200){
                return this.$message.error('获取'+this.titleTextname+'信息失败')
            }

            this.editForm = res.data

            this.editDialogVisible = true
        },
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        //修改确定
        editParams(){
            this.$refs.editFormRef.validate(async valid =>{
                if(!valid) return
                const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
                {
                    attr_name: this.editForm.attr_name,
                    attr_sel: this.activeName
                })
                if(res.meta.status!==200){
                    return this.$message.error('修改'+this.titleTextname+'失败')
                }
                this.$message.success('修改'+this.titleTextname+'成功')
                this.getParamsData()
                this.editDialogVisible = false
            })
        },
        //删除弹窗
        async deleteDialog(attr_id){
            const confirmResult = await this.$confirm('此操作将永久删除该'+this.titleTextname+'，是否继续?','提示',{
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(error=>error)
            if(confirmResult !== 'confirm'){
                return this.$message.info('已取消删除')
            }
            const { data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
            if(res.meta.status !== 200){
                return this.$message.error('删除'+this.titleTextname+'失败')
            }
            this.$message.success('删除'+this.titleTextname+'成功')
            this.getParamsData()
        },
        //添加新标签文本框失去焦点或者回车触发
        async handleInputConfirm(row){
            //输入内容为空
            if(row.inputValue.trim().length === 0){
                row.inputValue = ''
                row.inputVisible = false
                return
            }
            //输入内容不为空
            row.attr_vals.push(row.inputValue.trim())
            row.inputValue = ''
            row.inputVisible = false
            this.saveAttrVals(row)
        },
        async saveAttrVals(row){
             const {data : res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
            {
                attr_name: row.attr_name,
                attr_sel: row.attr_sel,
                attr_vals: row.attr_vals.join(' ')
            })
            if(res.meta.status!==200){
                return this.$message.error('修改参数项失败')
            }
            this.$message.success('修改参数项成功')
        },
        //点击按钮 显示输入框
        showInput(row){
            row.inputVisible = true
            //让文本框自动获得焦点
            //$nextTick 作用： 当页面上元素被重新渲染后 才会执行回调函数
            //中的代码
            this.$nextTick(_ => {
            this.$refs.saveTagInput.$refs.input.focus();
            });
        },
        handleClose(i,row){
            row.attr_vals.splice(i,1)
            this.saveAttrVals(row)
        }
    },

//计算属性
    computed:{
        //按钮禁用返回true 
        isBtnDisabled(){
            if(this.selectedCateKeys.length!==3){
                return true
            }
            return false
        },
        //当前选中的三级分类的Id
        cateId(){
            if(this.selectedCateKeys.length === 3){
                return this.selectedCateKeys[2]
            }
            return null
        },
        // 动态计算标题的文本
        titleText(){
            if(this.activeName === 'many'){
                return '动态参数'
            }
            return '静态属性'
        },
        titleTextname(){
            if(this.activeName === 'many'){
                return '参数'
            }
            return '属性'
        }
    }
}
</script>

<style scoped>
.cat{
    margin: 15px 0px;
}
.el-tag{
    margin: 10px;
}
.input-new-tag{
    width: 150px;
}
</style>
